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<?php
// This file is part of Moodle - http://moodle.org/
//
// Moodle is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Moodle is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
/**
* Task to cleanup old question statistics cache.
*
* @package core
* @copyright 2019 Simey Lameze <simey@moodle.com>
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
namespace core\task;
defined('MOODLE_INTERNAL') || die();
/**
* A task to cleanup old question statistics cache.
*
* @copyright 2019 Simey Lameze <simey@moodle.com>
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
class question_stats_cleanup_task extends scheduled_task {
/**
* Get a descriptive name for this task (shown to admins).
*
* @return string
*/
public function get_name() {
return get_string('taskquestionstatscleanupcron', 'admin');
}
/**
* Perform the cleanup task.
*/
public function execute() {
global $DB;
mtrace("\n Cleaning up old question statistics cache records...", '');
$expiretime = time() - 5 * HOURSECS;
$DB->delete_records_select('question_statistics', 'timemodified < ?', [$expiretime]);
$responseanlysisids = $DB->get_records_select_menu('question_response_analysis',
'timemodified < ?',
[$expiretime],
'id',
'id, id AS id2');
$DB->delete_records_list('question_response_analysis', 'id', $responseanlysisids);
$DB->delete_records_list('question_response_count', 'analysisid', $responseanlysisids);
mtrace('done.');
}
}